#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
int compute(int x) {
	int i = 0;
	int count = 0;
	for (i = 0; i<32; i++) {
		if ((x & 1) == 1) {
			count++;
			x >>= i;
		}
	}
	return count;
}
int main() {
	int ret = 0;
	scanf("%d", &ret);
	int end = compute(ret);
	printf("%d\n", end);
	return 0;
}
